No model



No. 770,701. PATENTED SEPT. 20, 1904. J. ROGER.

. FUENAGE FEEDER.

APPLICATION FILED JAN.1B, 1904.

N0 MODEL. 2 SHEETSSHEET 1.

W I e/J? 0 QM MW@ J5 i?? No. 770,701. PATENTED SEPT. 20, 1904@ J.E00EE.

PURNAGE FEEDER.

. APPLICATION FILED JAN. 1B, 1904. No MODEL, 2 SHEETS-SHEET 2.

Narr/0,701.

UNITED STATES Patented September 20, 1904.

PATENT OFFICE.

JOHN ROGER, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO THOMAS EDWARDS,OF BALLARAT, VICTORIA, AUSTRALIA.

FURNACE-FEEDER.

SPECIFICATION forming part of Letters Patent N0. 770,701, datedSeptember 20, 1904.

Application filed January 18, 1904:. Serial No. 189,597. (No model.)

. To @ZZ whom t may concern:

Be it known that I, JOHN ROGER, a subject of the King of Great Britain,residing at Denver, in the county of Denver and State of Colorado, haveinvented new and useful Improvements in Furnace-Feeders, of which thefollowing is a specification.

This invention relates generally to furnacefeeders, and particularlytoone of that class employed in feeding ore to ore-roasting furnaces.

The object of the invention is in a ready, positive, andthoroughly-efcient manner to feed ore or other material to a furnace; tocause the operation to be continuous and automatic and to feed only therequisite amount, thereby avoiding waste and improper treatment of theore; to obviate wear of the parts, thus to increase the usefulness ofthe apparatus, and generally to improve apparatus of this description.

With the above and other objects in view, as will appear as the natureof the invention is better understood, the same consists, generallystated, in a novel form of ore-feeding apparatus which is constructedand operates in such manner as to cause positive feed of ore to thehearth or furnace on one movement and on the opposite movement to clearthe ore, thus to prevent any waste, as by dragging or pulling the oreout of the furnace. In apparatus of this character it is necessary inorder to secure the best and proper results to construct the feedingapparatus in such manner as to reduce danger of breakage orinoperativeness in use to a minimum. This result is of course secured bysimplifying the construction of the parts which go to make up theapparatus and at the same time to dispose them in such manner withrelation to the furnace as to permit of ready repairs, if necessary.

As will presently appear, all the objects above stated are secured inthe present invention in a manner that is at once feasible andpracticable and will not necessitate any change in the structuralarrangement of an existing furnace to adapt the present improvementsthereto.

In the accompanying drawings, forming a part of this specification, andin which like characters of reference indicate corresponding parts,there is illustrated one form of embodiment of the invention capable ofcarrying the same into practical operation, it being understood that theelements therein exhibited may be varied or changed as to shape,proportion, and eXact manner of assemblage without departing from thespirit thereof.

In the drawings, Figure l is a view in hori- Zontal section of anore-roasting furnace, eX- hibiting -the apparatus of the presentinvention operatively connected therewith. Fig. 2 is a view in verticaltransverse section showing certain parts omitted in Fig. 1. Fig. 3 is aview in side elevation.

In defining the operations of the ore-feeding mechanism the termscharging and recharging are employed, the term charging meaning thebackward movement of the apparatus to receive a fresh charge of ore orthe like, and the term recharging meaning the forward movement when theapparatus conveys or pushes the ore into the furnace.

The ore-feeding mechanism of the present invention is adapted for use,in connection with any style of ore-roasting furnace and in thisinstance is shown as combined with what is known as the Edwardsore-roasting furnace. As the furnace per se forms no essential part ofthe present invention, detailed description of the parts thereof willnot be given other than to state that 1 is the shell of the furnace,which' may be constructed in any manner; 2, the roasting-hearth; 3, thearch over the hearth which incloses the chamber for the passage of hotgases, as usual, and I rabble-arms, which are carried by vertical shafts5 and perform the functions common to such elements, the shafts 5 beingdriven from any suitable Source of power through the medium of pinions6, meshing with bevel-gears 7, carried by the shafts 5, the pinionsbeing carried by a shaft 8, driven from any source of power, notnecessary to be shown.

The present invention, as before stated, resides in the novel form ofmechanism for feeding proper amounts of ore or other material to theroasting-hearth.

lIo

Before describing the furnace mechanism it may be stated that a suitablehopper 8u is disposed at the feed end of lthe furnace, said hopperbeingprovided with a chute 9, which discharges ore at the proper point withinthe furnace,'to be supplied thereto by the feeding mechanism. There is agate 10 combined with the chute, b v which the amount of ore fed may beregulated at will, and the bottom portion of the hopper may be closed bya cutoff valve 11, carried by an arm 12. In the operation of the machinethe valve 11 may be open to permit free passage of ore down the chuteand Ainto the furnace, the amount to be supplied to the furnace beingdetermined by the adjustment of the gate 10; but in the event that it isdesired suddenly and entirely to cut off the supply of ore or othermaterial to the furnace thc valve 11 is closed for this purpose.

The feeding mechanism embodies a rod or bar 13, carrying a plurality ofhoes 14, suitably spaced apart, the said hoes when the ore is being fedto the furnace passing close to the bottom of the roasting-hearth; buton the return movement when a fresh supply is to be fed to the furnacethe hoes are raised above ythe ore, thus to prevent any tendency on thepart ofthe feeding apparatus to drag out portions of the ore that wouldotherwise be contained between the hoes. The rod works in an opening 15,formed in one wall of the furnace, said opening being of the proper sizeto allow free motion of the hoes without danger of binding. The rod13'is fulcrumed intermediate of its ends upon a pin or bolt 16, whichpasses through two bell-crank levers 17, fulcrumed at their upper endsupon a rock-arm 18, the latter being supported upon a shaft 19, workingin suitable boxes 20. The rear or outer end of the rod is fulcrumedbetween the upper ends of two links 2.1, being held in operativeposition through the medium of a pin or bolt 22, which passes throughthe two links and the rod. As shown in Fig. 2, the rockarm com prisestwo members, which are spaced apart a sufficient distance to allow thehoe-rod to reciprocate between them, the rock-arm being actuated througha connecting-rod 24,0ne end of which is connected with a crank-pin 25,carried by a disk 26, mounted on a shaft 27, the said shaft being drivenfrom the shaft 8 through the medium of a pinion 28,carried by the shaft8, and a gear 29, carried by the shaft 27. The timing of the parts is tobe such that there will be no interference between the rabble-arms andthe hoe-rod. It will be seen from the arrangementl of mechanism thatwhen the disk 26 revolves a reciprocating motion will be imparted to theconnecting-rod 24, andthis latter will impart a reciprocatory movementto the rock-arm 18, thereby causing the hoe-rod to enter and leave theroasting hearth or furnace, the forward movement of the hoe-rod causingvthe .ore

which has been deposited upon the hearth to be moved inward the properdistance to be acted upon properly bythev rabble-arms. As before stated,in its forward or feed movement the hoes 14 work in close proximity tothe heartlnand thus positively feed all of the ore or dust into thefurnace. As before pointed out, it is necessary that the hoe-rod shouldbe lifted on its backward movement to prevent the hoes from dragging theore and dust out of the furnace, and to effect this result theconnecting-rod is provided with a vertical member 30, rising in thisinstance from the fulcrum 31 of the rod, the upper end of the arm 30having pivotally connected' with it one endmof alink 32,4the other endof the link being pivotally connected with the lower ends of thebell-crank levers 17, as clearly shown in Fig. 2. The connecting-rodalso is provided 4with a longitudinal extension 33, which projectsbeyond the fulcrum-point 31 and is connected with the lower end of thelinks 21 at 84.

From the arrangement of mechanism disclosed it will be seen that whenthe crank-pin 25 is turned in the direction of the arrow shown in Fig.2, under which motion the hoe-rod is projected into the-hearth, as theIcrank-pin passes its forward dead-center the forward end of theconnecting-rod will be depressed, thereby projecting the arm 30 towardthe furnace and through the link 32 rocking the bell-crank levers 17 ina direction to raise their horizontal members, and thus lift the hoesaway from the hearth. When the crank-pin passes its rear dead-center,the forward end of the connecting-arm is raised, thereby swinging thearm 30 away from the furnace and through the medium of the link 32depressing the horizontal members of the bell-crank levers and causingthe hoes to approach the hearth, so that upon the forward movement ofthe hoe-rod the proper feeding of the ore to the hearth is effected. Bythe provision of the links 21 the forward end of the hoe-rod ispositively held from dropping and is further caused to move in a lineparallel with the hearth.

It will be seen from the foregoing description that while the mechanismof this present invention is exceedingly simple in construction it willbe found thoroughly eiicient and durable in use for the purpose designedand that danger of breakage in use or derangement is reduced to aminimum.

Having thus described the invention, what I claim is-- l. In anapparatus of the class described, an ore-feeding element comprising abody member provided .with a plurality of rigid depending blades orhoes, means for actuating successively a downward, forward, upward, andretracting movement of the element, and means for delivering materialbetween the blades.

TOO

IIO

2. .In anA apparatus of the class described, a rod carrying a pluralityof blades or hoes, a roclarm,bellcrank levers carried by the rock-armand operatively connected with the rod, a connecting-rod, and aconnection between the connecting-rod and one of the arms of thebell-crank levers.

3. In an apparatus of the class described, a rod carrying a plurality ofblades or hoes, a rock-arm, bell-crank levers pivoted at their bend tothe rock-arm,` connections between oneof each of the arms of thebell-crank levers and the rods, a connecting-rod pivotally connectedwith the rock-arm, means for reciprocating the connecting-rod, and meansfor connecting' one of the arms of each of the bell-crank levers with aportion of the connecting-rod.

4. In an apparatus of the class described, a rod carrying a plurality ofblades or hoes, a rock-arm, bell-crank levers carried bythe upperportion oi' the rock-arm and operatively connected with the rod, aconnectingrod pivoted to the rock-arm and provided with a verticalextension, and links connecting the 1extension with the free arm of thebell-crank ever.

5. In an apparatus ofthe class described, a rod carryinga plurality oi'blades or hoes,

a rock-arm, bell-crank levers pivotally connected to the upper portionof the rock-arm,

of the bell-crank levers, and links connecting n the terminal oi' thehorizontal section with .the outer terminal of the hoe-rod.

6. An ore-roasting furnace having an opening in one side and afeed-chute communicating therewith, rabble mechanism arranged within thefurnace, a rod carrying a plurality of blades or hoes, a rocking arm,bell-crank levers carried by the rocking arm and operatively connectedwith the rod, a connectingroddriven by the rabble-actuating mechanism,and a connection between the connecting-rod and one of the arms of thebell-crank levers.

In testimony whereof I have hereunto set myhand in presence of twosubscribing witnesses.

JOHN ROGER. Witnesses:

N.. HADFIELD, K. F. CAssIDY.

